Question

the equation of the line of best fit is y = 0.755x + 11.339. based on the line of best fit, approximately how many customers are predicted to use a card to pay on a day when 90 customers pay by cash? a. 69 b. 79 c. 92 d. 104

Explanation:

Step1: Identify the variables

The equation of the line of best - fit is $y = 0.755x+11.339$, where $x$ represents the number of customers paying by cash and $y$ represents the number of customers paying by card.

Step2: Substitute the value of $x$

We are given that $x = 90$ (number of customers paying by cash). Substitute $x = 90$ into the equation $y=0.755x + 11.339$.
$y=0.755\times90+11.339$

Step3: Calculate the value of $y$

First, calculate $0.755\times90 = 67.95$. Then, $y=67.95 + 11.339=79.289\approx79$.

Answer:

B. 79